O'Sullivan Lake
50.425° N, 87.0483° W
O'Sullivan Lake, Ontario. 50.425° N, 87.0483° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/o-sullivan-lake/, compiled October 9, 2026
- Canadian Geographical Names Database, Natural Resources Canada. Contains information licensed under the Open Government Licence – Canada.
- HydroLAKES v1.0, Messager et al. 2016 / WWF HydroSHEDS. Licensed under CC BY 4.0.
- Census boundaries and population, 2021, Statistics Canada. Adapted from Statistics Canada. This does not constitute an endorsement by Statistics Canada.
- Fisheries Management Zones, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- Bathymetry lines and survey index, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
- City page weather forecasts and alerts, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).
O'Sullivan Lake covers 42.4 km², Ontario. It lies 38 km northwest of Nakina.
- Area
- 42.4 km²
- Shoreline
- 180 km
- Elevation
- 288 m
Today on the water
1 °C
Observed at Greenstone (Nakina), as of 9:00 a.m. EDT
| Time | 10 a.m. | 1 p.m. | 4 p.m. | 7 p.m. | 10 p.m. | 1 a.m. | 4 a.m. | 7 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | var. 5 | W 20 | W 20 | var. 5 | SE 10 | S 10 | SE 10 | SE 20 |
| Gusts km/h | 40 | 40 | 40 | |||||
| Temp. °C | 4 | 8 | 10 | 8 | 6 | 5 | 3 | 2 |
| Precip. % | 0 | 0 | 0 | 0 | 0 | 40 | 40 | 40 |
Today: A mix of sun and cloud. Wind becoming west 20 km/h gusting to 40 late this morning. High 10. UV index 2 or low.
Weather: Greenstone (Nakina) (local forecast), as of 9:02 a.m. EDT
Sun and moon
- Civil dawn
- 7:28 a.m.
- Sunrise
- 8:01 a.m.
- Sunset
- 7:08 p.m.
- Civil dusk
- 7:41 p.m.
- Moonrise
- 6:52 a.m.
- Moonset
- 6:27 p.m.
- Moon
- Waning crescent, 1% lit